Change filter: { type: :request } => :autodoc
Map-Reduce pattern

Map: collect example context
Reduce: render document from example
Move transaction responsibility from autodoc to renderer
Refactor reduce part
Move rspec-hook code to rspec.rb
Move base path setting to configuration.rb
Remove hoary comment
Refactor: remove transaction
Refactor: move template to template.rb
Fix actionpack dependency
v0.2.3